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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2010-2011, NVIDIA Corporation</span>
<a name="l00003"></a>00003 <span class="comment"> * All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"> *   * Redistributions of source code must retain the above copyright</span>
<a name="l00008"></a>00008 <span class="comment"> *     notice, this list of conditions and the following disclaimer.</span>
<a name="l00009"></a>00009 <span class="comment"> *   * Redistributions in binary form must reproduce the above copyright</span>
<a name="l00010"></a>00010 <span class="comment"> *     notice, this list of conditions and the following disclaimer in the</span>
<a name="l00011"></a>00011 <span class="comment"> *     documentation and/or other materials provided with the distribution.</span>
<a name="l00012"></a>00012 <span class="comment"> *   * Neither the name of NVIDIA Corporation nor the</span>
<a name="l00013"></a>00013 <span class="comment"> *     names of its contributors may be used to endorse or promote products</span>
<a name="l00014"></a>00014 <span class="comment"> *     derived from this software without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; AND</span>
<a name="l00017"></a>00017 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span>
<a name="l00018"></a>00018 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</span>
<a name="l00019"></a>00019 <span class="comment"> * DISCLAIMED. IN NO EVENT SHALL &lt;COPYRIGHT HOLDER&gt; BE LIABLE FOR ANY</span>
<a name="l00020"></a>00020 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span>
<a name="l00021"></a>00021 <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span>
<a name="l00022"></a>00022 <span class="comment"> * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND</span>
<a name="l00023"></a>00023 <span class="comment"> * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00024"></a>00024 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00025"></a>00025 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00026"></a>00026 <span class="comment"> */</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 <span class="preprocessor">#pragma once</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include &lt;<a class="code" href="bvh_8h.html" title="Entry point to the generic Bounding Volume Hierarchy library.">nih/bvh/bvh.h</a>&gt;</span>
<a name="l00031"></a>00031 <span class="preprocessor">#include &lt;thrust/device_vector.h&gt;</span>
<a name="l00032"></a>00032 
<a name="l00033"></a>00033 <span class="keyword">namespace </span>nih {
<a name="l00034"></a>00034 <span class="keyword">namespace </span>cuda {
<a name="l00035"></a>00035 
<a name="l00038"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html">00038</a> <span class="keyword">struct </span><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html">LBVH_context</a>
<a name="l00039"></a>00039 {
<a name="l00041"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html">00041</a>     <span class="keyword">struct </span><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html" title="Cuda accessor struct.">Context</a>
<a name="l00042"></a>00042     {
<a name="l00043"></a>00043         NIH_HOST_DEVICE <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html" title="Cuda accessor struct.">Context</a>() {}
<a name="l00044"></a>00044         NIH_HOST_DEVICE <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html" title="Cuda accessor struct.">Context</a>(<a class="code" href="structnih_1_1_bvh__node.html">Bvh_node</a>* nodes, uint2* leaves) :
<a name="l00045"></a>00045             <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#ab76a1346e3cb93f5361820cd7404261c" title="node pointer">m_nodes</a>(nodes), <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a1ef407bbbfb375bd9bcb48596e558598" title="leaf pointer">m_leaves</a>(leaves) {}
<a name="l00046"></a>00046 
<a name="l00048"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a01bc38979207524a3965460096336a9a">00048</a>         NIH_HOST_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a01bc38979207524a3965460096336a9a" title="write a new node">write_node</a>(<span class="keyword">const</span> uint32 node, <span class="keywordtype">bool</span> p1, <span class="keywordtype">bool</span> p2, <span class="keyword">const</span> uint32 offset, <span class="keyword">const</span> uint32 skip_node, <span class="keyword">const</span> uint32 level, <span class="keyword">const</span> uint32 begin, <span class="keyword">const</span> uint32 end, <span class="keyword">const</span> uint32 split_index)
<a name="l00049"></a>00049         {
<a name="l00050"></a>00050             <span class="keyword">const</span> uint32 type = p1 == <span class="keyword">false</span> &amp;&amp; p2 == <span class="keyword">false</span> ? Bvh_node::kLeaf : Bvh_node::kInternal;
<a name="l00051"></a>00051             <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#ab76a1346e3cb93f5361820cd7404261c" title="node pointer">m_nodes</a>[ node ] = <a class="code" href="structnih_1_1_bvh__node.html">Bvh_node</a>( type, offset, skip_node );
<a name="l00052"></a>00052         }
<a name="l00054"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a1a3568a9281f2af0787dfbb641f9b68e">00054</a>         NIH_HOST_DEVICE <span class="keywordtype">void</span> <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a1a3568a9281f2af0787dfbb641f9b68e" title="write a new leaf">write_leaf</a>(<span class="keyword">const</span> uint32 index, <span class="keyword">const</span> uint32 begin, <span class="keyword">const</span> uint32 end)
<a name="l00055"></a>00055         {
<a name="l00056"></a>00056             <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a1ef407bbbfb375bd9bcb48596e558598" title="leaf pointer">m_leaves</a>[ index ] = make_uint2( begin, end );
<a name="l00057"></a>00057         }
<a name="l00058"></a>00058 
<a name="l00059"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#ab76a1346e3cb93f5361820cd7404261c">00059</a>         <a class="code" href="structnih_1_1_bvh__node.html">Bvh_node</a>*  <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#ab76a1346e3cb93f5361820cd7404261c" title="node pointer">m_nodes</a>;    
<a name="l00060"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a1ef407bbbfb375bd9bcb48596e558598">00060</a>         uint2*     <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html#a1ef407bbbfb375bd9bcb48596e558598" title="leaf pointer">m_leaves</a>;   
<a name="l00061"></a>00061     };
<a name="l00062"></a>00062 
<a name="l00064"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a43f6c8c15ef0959a308ff72c7a01b44d">00064</a>     <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a43f6c8c15ef0959a308ff72c7a01b44d" title="constructor">LBVH_context</a>(
<a name="l00065"></a>00065         thrust::device_vector&lt;Bvh_node&gt;* nodes,
<a name="l00066"></a>00066         thrust::device_vector&lt;uint2&gt;*    leaves) :
<a name="l00067"></a>00067         m_nodes( nodes ), m_leaves( leaves ) {}
<a name="l00068"></a>00068 
<a name="l00070"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a993469fba3b80c21b6aad7f7c2eea4ac">00070</a>     <span class="keywordtype">void</span> <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a993469fba3b80c21b6aad7f7c2eea4ac" title="reserve space for more nodes">reserve_nodes</a>(<span class="keyword">const</span> uint32 n) { <span class="keywordflow">if</span> (m_nodes-&gt;size() &lt; n) m_nodes-&gt;resize(n); }
<a name="l00071"></a>00071 
<a name="l00073"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a3524d8d9d8962af68f91705d9c8df7dd">00073</a>     <span class="keywordtype">void</span> <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a3524d8d9d8962af68f91705d9c8df7dd" title="reserve space for more leaves">reserve_leaves</a>(<span class="keyword">const</span> uint32 n) { <span class="keywordflow">if</span> (m_leaves-&gt;size() &lt; n) m_leaves-&gt;resize(n); }
<a name="l00074"></a>00074 
<a name="l00076"></a><a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a9e5beb3abb75cf8e0f0b3a1202a29aea">00076</a>     <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html" title="Cuda accessor struct.">Context</a> <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context.html#a9e5beb3abb75cf8e0f0b3a1202a29aea" title="return a cuda context">get_context</a>()
<a name="l00077"></a>00077     {
<a name="l00078"></a>00078         <span class="keywordflow">return</span> <a class="code" href="structnih_1_1cuda_1_1_l_b_v_h__context_1_1_context.html" title="Cuda accessor struct.">Context</a>(
<a name="l00079"></a>00079             thrust::raw_pointer_cast( &amp;m_nodes-&gt;front() ),
<a name="l00080"></a>00080             thrust::raw_pointer_cast( &amp;m_leaves-&gt;front() ) );
<a name="l00081"></a>00081     }
<a name="l00082"></a>00082 
<a name="l00083"></a>00083     thrust::device_vector&lt;Bvh_node&gt;* m_nodes;
<a name="l00084"></a>00084     thrust::device_vector&lt;uint2&gt;*    m_leaves;
<a name="l00085"></a>00085 };
<a name="l00086"></a>00086 
<a name="l00087"></a>00087 } <span class="comment">// namespace cuda</span>
<a name="l00088"></a>00088 } <span class="comment">// namespace nih</span>
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